Greater London · England
Window Mastic in Gallows Corner
Window mastic for Gallows Corner and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Water coming in at the bottom corners of a door
- Sealant in the wrong colour for the frame
- Cracked internal joints between frame and plaster
Surface by surface
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. We cut it out, back any deep gaps and reseal properly.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the threshold joint takes a lot of water. We prepare and reseal every joint, backing the deep ones.
Window mastic in Gallows Corner, done properly
Colour matters on a frame. White, brown, anthracite grey, black and clear sealants are all available, so the bead blends with the window rather than framing it. We work on aluminium frames, timber windows & doors and composite doors, and people most often call us about rushed sealant from a window installation and sealant in the wrong colour for the frame.
London has a lot of flats and conversions, where windows are often on upper floors. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Gallows Corner is something to talk through when you book.
There’s a 12-month guarantee on every job.
- Place
- Gallows Corner (RM3, RM2, RM11)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Gallows Corner
More services for Gallows Corner
What happens on the day
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and clear up. It normally takes most of a day for a typical house, less for a few frames. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- First we look at every frame and agree the list.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Move anything stored near the joints
- Tell us about any previous sealing or DIY attempts
Ask for a quote
Need a quote? Please phone 0345 464 0079 or send us an email with a few details. We’ll explain what we’d do and give you a clear price before any work starts.
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What affects the cost of window mastic
The price is agreed before any work begins. It takes into account:
- Which sealant suits the joint
- When we can work, for business premises
- How easy the joints are to reach
- How many areas need sealing
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What we need to know
What to tell us when you ask for a quote:
- If it’s domestic, commercial or a hotel
- What’s wrong with the joints now
- Any access issues, like height or stairs
- How many joints, rooms or windows are involved
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Do you need window mastic in Gallows Corner?
Mastic ages in the weather. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
Most people get in touch when they notice something like this:
- Damp patches on the reveal after heavy rain
- Hard, cracked sealant around windows
- Rushed sealant from a window installation
- Black, perished sealant on frames
In the older streets around St Michael and All Angels Church, the joint between an old wall and a newer frame is normally the first place rain gets in.
What your quote should include
- What happens if they find a problem under the old sealant
- Are they insured?
- Whether the sealant suits the joint
- How the joint is cleaned and prepared
Honest limits
To be straight with you, some problems need a different trade:
- Worn gaskets, brush seals or a door that has dropped
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Soft or decayed wood in the frame
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Where we work in Gallows Corner
- Aluminium frames
- Composite doors
- Patio & French doors
- uPVC windows
- Timber windows & doors
- Window sills
Questions from Gallows Corner
I let a flat near Gidea Park station. Can you help?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
Is Gallows Corner in your area for window mastic?
Yes, Gallows Corner is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear quote.
Will new mastic stop draughts?
It will if the frame joint is the problem. We find where the air is coming from before we reseal.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Gallows Corner and the rest of Greater London, along with the rest of our area.
Are you fully insured?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Can new sealant go over the old?
No, it will not last. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What should I tell you?
Let us know what needs doing and where, plus photos if you have them. We’ll ask anything else we need to know.
Can new window sealant be painted?
Most silicone can’t be painted. Let us know beforehand, and we’ll use a paintable product where it suits.
Windows and doors in Gallows Corner
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Hare Hall (about 0.5 miles south) nearby, there’s older building stock in the area around Gallows Corner as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For site and facilities teams at buildings such as Royal Liberty School, the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Gidea Park station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Gallows Corner is about 2 miles north-east of Romford, in Greater London. Homes, rented property, offices and hotels in Gallows Corner is covered for window mastic, old or new, large or small. Every job comes with our one-year guarantee. 764 places in Greater London are on our list. You can also see our page for London, roughly 15 miles from Gallows Corner.
Our applicators cover all of the RM3, RM2 and RM11 postcode area for window mastic. That includes homes and businesses on Ewan Road, Briar Road and Bell Avenue and the roads around them. Other places close to Gallows Corner include Gidea Park (1 mile west), Ardleigh Green (1 mile south), Harold Wood (1 mile east), Heath Park (1 mile south) and Emerson Park (1 mile south-east). Larger places within reach include London (15 miles south-west), St Pancras (15 miles west), Shoreditch (13 miles west), Walthamstow (10 miles west), Hoxton (13 miles west) and Whitechapel (13 miles south-west).
What’s near Gallows Corner
In Gallows Corner, that means homes and buildings near Havering College of Further and Higher Education, Ardleigh Green Junior School and Raphael Park. Gallows Corner’s nearest station is Gidea Park station, roughly 0.8 miles south-west of the centre. A little further out are Upminster Tithe Barn Museum of Nostalgia (2.6 miles south-east) and Harold Wood Hospital (0.6 miles east). For a walk, there’s Bedfords Park.
For landlords and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.